feat(ios): ship native SimDeck Studio client

[DjDeveloperr]

Summary

• Add a native SwiftUI iOS app under ios/ for connecting to SimDeck over LAN, Tailscale, and simdeck.djdev.me Studio links.
• Implement WebRTC streaming, simulator discovery, pairing, stream quality controls, simulator creation, and native toolbar/sheet flows.
• Add haptics support, persistent server selection, and an icon/app bundle setup for the new iOS target.
• Update server and docs to support native pairing/token flow and Bonjour advertising for _simdeck._tcp.

Testing

• Built the iOS app successfully with Xcode and installed/launched it on a physical iPhone.
• Built the Rust server successfully after the pairing/advertising changes.
• Verified pairing returns a JSON access token and that Bonjour advertising is published for discovery.